svn commit: r344589 - head/sys/arm64/rockchip/clk
Emmanuel Vadot
manu at FreeBSD.org
Tue Feb 26 17:08:52 UTC 2019
Author: manu
Date: Tue Feb 26 17:08:51 2019
New Revision: 344589
URL: https://svnweb.freebsd.org/changeset/base/344589
Log:
arm64: rockchip: rk3399_pll: Switch to slow mode when changing the freq
Like r344578 but for RK3399.
This solve some hangs when switching between frequency.
MFC after: 1 week
Modified:
head/sys/arm64/rockchip/clk/rk_clk_pll.c
Modified: head/sys/arm64/rockchip/clk/rk_clk_pll.c
==============================================================================
--- head/sys/arm64/rockchip/clk/rk_clk_pll.c Tue Feb 26 16:34:43 2019 (r344588)
+++ head/sys/arm64/rockchip/clk/rk_clk_pll.c Tue Feb 26 17:08:51 2019 (r344589)
@@ -424,6 +424,11 @@ rk3399_clk_pll_set_freq(struct clknode *clk, uint64_t
DEVICE_LOCK(clk);
+ /* Setting to slow mode during frequency change */
+ reg = RK3399_CLK_PLL_MODE_SLOW << RK3399_CLK_PLL_MODE_SHIFT;
+ reg |= RK3399_CLK_PLL_MODE_MASK << RK_CLK_PLL_MASK_SHIFT;
+ WRITE4(clk, sc->mode_reg, reg);
+
/* Setting fbdiv */
READ4(clk, sc->base_offset, ®);
reg &= ~RK3399_CLK_PLL_FBDIV_MASK;
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